Periodic ethylene-vinyl alcohol copolymers via ADMET polymerization: Synthesis, characterization, and thermal property
作者:Zi-Long Li、An Lv、Lei Li、Xin-Xing Deng、Li-Jing Zhang、Fu-Sheng Du、Zi-Chen Li
DOI:10.1016/j.polymer.2013.05.037
日期:2013.7
content viaADMET. These polymer samples were characterized by gel permeation chromatography (GPC), NMR, and matrix-assisted laser desorption/ionization time-of-fight mass spectroscopy (MALDI-TOF-MS). Thermalproperties of EVAc and EVA copolymers were investigated by thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC). EVAc copolymers exhibited two-stage decompositions on
The present invention provides an industrially advantageous process for producing a hydrogenated polymer comprising subjecting a polymer having an olefinic carbon-carbon double bond and hydroxy group and/or a functional group which is convertible into hydroxy group or convertible into hydroxymethyl group to hydrogenation under the presence of palladium on a basic activated carbon and/or platinum on a basic activated carbon. The process of the present invention can produce a hydrogenated polymer having hydroxy group and/or a functional group which is convertible into hydroxy group or convertible into hydroxymethyl group with high retention of a functional group and can achieve a high hydrogenation ratio together with good hydrogenation rate.
One-pot chemoenzymatic reactions in water enabled by micellar encapsulation
作者:Courtney J. Hastings、Nicholas P. Adams、Jurgen Bushi、Samuel J. Kolb
DOI:10.1039/d0gc01989e
日期:——
The use of micellar conditions to enable one-pot reactions involving both transition metal and enzymatic catalysts is reported. Representative enzymatic transformations under micellar conditions are unaffected by the presence of non-ionic surfactants, including designer surfactants such as TPGS-750-M. Furthermore, the presence of enzymes has a negligible effect on transition metal catalysis under micellar